... Automatic Welder,Type: NB-200KR, NB-350KR, NB-500KR NB Thyristor Controller CO2/MAG Automatic Welder adopts integrate circuit, technology of ... cooperate with other kinds of air automatic welding machine.It is suit for welding many kinds of metal, such as low ... alloy steel, high strength steel, stainless steel and aluminum.It is suit for car building, metal structure, chemical machinery, boiler pressure ...